Servo Motor: Inspection

WARNING: This page is about a different car, the 2007 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT AIR INLET CONTROL SERVO MOTOR
1. Inspect the servo motor operation.
  1. Connect the positive (+) lead from the battery to terminal 1 (FRS) and negative (-) lead to terminals 2 (REC), then check that the shaft rotates clockwise smoothly.
  2. Connect the positive (+) lead from the battery to terminal 2 (REC) and negative (-) lead to terminal 1 (FRS) then check that the shaft rotates counter clockwise smoothly.
    If the operations are not as specified, replace the air control servo motor.
    
    Fig 1: Inspecting Air Inlet Control Servo Motor Operation
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT MODE CONTROL SERVO MOTOR
1. Inspect the servo motor operation.
  1. When 12 V is applied between terminals 4 (IGN) and 1 (GND), and 0 V is applied between terminals 2 (SIG) and 1 (GND), check that the line connecting the 2 notches moves to the 0 V position.
    If the result is not as specified, replace the mode control servo motor.
  2. When 12 V is applied between terminals 4 (IGN) and 1 (GND), and 6 V is applied between terminals 2 (SIG) and 1 (GND), check that the line connecting the 2 notches moves to the 6 V position.
    If the result is not as specified, replace the mode control servo motor.
  3. When 12 V is applied between terminals 4 (IGN) and 1 (GND), and between terminals 2 (SIG) and 1 (GND), check that the line connecting the 2 notches moves to the 12 V position.
    If the result is not as specified, replace the mode control servo motor.
    
    Fig 2: Inspecting Mode Control Servo Motor Operation
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT AIR MIX CONTROL SERVO MOTOR
1. Inspect the servo motor operation.
  1. When 12 V is applied between terminals 4 (IGN) and 1 (GND), and 0V is applied between terminals 2 (SIG) and 1 (GND), check that the line connecting the 2 notches moves to the 0 V position.
    If the result is not as specified, replace the air mix control servo motor.
  2. When 12 V is applied between terminals 4 (IGN) and 1 (GND), and 6V is applied between terminals 2 (SIG) and 1 (GND), check that the line connecting the 2 notches moves to the 6 V position.
    If the result is not as specified, replace the air mix control servo motor.
  3. When 12 V is applied between terminals 4 (IGN) and 1 (GND), and between terminals 2 (SIG) and 1 (GND), check that the line connecting the 2 notches moves to the 12 V position.
    If the result is not as specified, replace the air mix control servo motor.
    
    Fig 3: Inspecting Air Mix Control Servo Motor Operation
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002